Refrigerating-machine.



PATENTED APR. 12, 1904.

mfvamsv.

J; b. GODSMANN. REFRIGBRATING MACHINE.

APPLICATION TILED OUT. 8. 1903.

N0 MODEL.

U I Ede/255m" PM?! if f :12 l w. W M

M w 7% j eego in the county of Cook l fe: semen Patented. Ami 1964JUSTUS C. GOOSliiAllN, OFiJHICAlf-ii), KLLTLNOIS.

eeeeieeemwie meomoien EEPECIFICAT-IQN forming;

To did/05mm :51 may concer'n: Be ii; known fillet I, Josrvos C. citizenof the Umiecltltefies,

Goosmzms, residing ee Chienci' State of lilinoisi, hove invent-ecicertain new and useful Improvements in. Refrigerating-Machines; ami do hereby declare the following to be a foil, clear, and exact;description of the invention, such as will enable others skilled in theart; to which it epperteins to make and use the same. Myinventionrelaies to novel construction in e zfefi'ig'eretirigsnoohine,and more perticw lei'ly to devices for saving escaping gas leakingthrough the stuifing-box and returning some ineo'tlie system, the objectbeing to pro-- Vide simple and efiicicnt devices of this chew ester; andit CDZlSlSiJS in the features of eensanction and combinations of ps -eshereinafter fully described andcleimmi.

The my invention, show ehe'siuhing-box of. a re frigeroting or icemachine end my devices for saving the escape gas in centrallongiiuclinol section. 7

My present invention is an improvement upon the device forming subjectof Letters latoot No. 719,460, granted iao me on February 3., 1903, inWhieh the eseepogas-controlliog means are controlled by the pressure ofthe oil fed to like stofiing-loox. In my present inveniion theescape-gas-eonirolliog devices ere en tirely independent of lakeiubricoting means, oi as enabling me to regulate the pressure of eachWiilllfllli) elfecting the other.

The swing-box A, tlii'oizeh which the pieton-rod B passes, is provided"with the snow lei oil-chamber U, which is fed by a pump l), s constantcirculation being maintained l3 moons of a. return-pipe E, leading fromsaid chamber 1 to the oileeok l emithe pressure of said oi! controlledby a valve G interposed in said pipe E in so. obvious manner. Betweensaid annular obi-amber C and the cylinder P an annular gee-chamber I,receiviiig the gas escaping from the cyiiniler H and said chamber 1 isconnected bye pipe 3 with the upper end av cylimlei" K. in said cylinderK is 22. pissou L and hollow trunk-valve M, connected together by episton iocl ll Said valve M controls the goo l'iiowmii' U, which isconnect-- accompanying drawings illusti'eiing' part of Letters Patent No?,39'3} defied April 1 2, lime. Application filed. October 8, 1903 ISerial No, 175,316. (1% model.)

. with heavy liquiii, such oil. The pistonrod V of said pision 'i isconnected so its upper end with a lever W, pivotelly mounted at one endon an arm of the casing of said cyi inflers S and K and carrying alongitudinallyecljustsbie Weight X sin its free end, said weiehtexerting its to neid the letter at the lower limit of its movement, andthrough the mecliomoi the thezem said passage U end 'tlieoil contained.weighe'elso serves to hold said. piston L at the upper limit of itsmoeemene, so that said valve M covers sold biow-ofi O". The

seicicylimler and each connection pressure onssid piston T which,togetl'ier position of said Weight on said lever W" obviously deem-minesthe pressure required to 10 ton L to depress see; to cause blow-- off Oto be uncovered. The escepioq gas collects iii-said chamber 1, pipe FLori cylindex K, and when the pressure of said-gee has attained acerteizipoint she blow-oi? U is obviously uncovered into the chamber or pocketQ, whence said gas passes into the cylinder H es soon as the thepressure in said eod'of said cylindez' is less time the pressure in saidcliember Q,

as will be obvious I It is essential that the escaping should bemaintained at e high pressure, for the reason that this serves in iiseiito pi'e-f vent excessive escape and aids in maintaining a definitecompressioc-pressore in the cylin- H, sod, further, it prevense theexcessive flow of oil. which migl'it O'iijlBFWlSfi final its Way intoeeiel cyliz'ider, so the-i; the oii and escape gas serve as checks oneach other, the oil seal formed ogy said. annular chamber (3 serving toprevent escape of and one seal like wise sewing io prevent an excess or"oil entering" the cylinder ll. I

To enable the escope-ges pressure to be properly controlled, 1 provide apressuree exerted on the upper face of mixevioio and such gas eseepcs' apiston in said other cylinder, a fluid-pres gage Y on the pipe J, whichindicates the pressure and enables the weight X to be adjusted to theproper 'iosition, such weight being heldat any desired point on thelever W by means of the set-screw Z.

.1 claim as my invention-s- 1. The combination with thecompressorcylinder and stufiing-box oi a refrigerating- -machine, anescape-gas chamber in said stuffing-box, an escape-gas chamber havingvalvecontrolled connection with said cylinder, and connection betweensaid escape-gas chambers, of two dilierential cylinders, one of which isinterposed in said connection between said escape-gas chambers, apiston-valve'in said cylinder controlling said connection, a piston insaid cylinder controlling" said piston-valve,

sure passage connecting said cylinders and serving" to transmit motionfrom one piston to the other thereof, and a weight bearing on saidlast-named piston to hold same at the lower limit of its movementagainst the action of the escape-gas pressure and hold said piston-valvein position to cutoff the connection between said escape-gas chambers,substantially as described.

2. In a refrigerating-machine, the combination with the compressor-cylinder and stutting-box,of an escape-gas chamber in saidstuffing-box, a pocket adapted to receive the escape gas from saidstuiiing-box chamber, and valve controlled connection between saidpocket and said compressor-cylinder, oi? a cylinder connected with saidstufling-box chunk her, a piston therein, connection between saidcylinder and said poclet,a piston-valve 1n said 1 cylinder connectedwith said piston and con-' trolling the connection between said cylinderand said pocket, a fluid-pressure chamber on the other side of saidpiston, a second cylinder connected with said fluid-pressure chamher, apiston in said cylinder, a lever pivotally mounted at one end andcarrying aweight at its frec'end, and connection between said last-namedpiston and said lever ad jaccnt the pivot of the latter, said leverbeing adapted to bear upon said piston to control the pressure in saidfluid-pressure chamber and thereby control the movements of saidfirst-named piston by the action of the escape-gas pres;-

sure, substantially as described.

3. In a ret'rigcrating-machine, the combination with thecompressor-cylinder and stuii ing-lmx, of an escape-gas chamber in saidstul'iing-box, an escape-gas-receiving chamber having valve-controlledconnection with said cylinder and connected with said stufiing-boxchamber, a valve-chaml. er interposed in said connection, aflnid-pressurc-actuated pistonvalve in said chamber controlling saidconncc tion and actuated in one direction by the escape-gas pressure,fluid-pressure devices actuating said piston-valve against the action ofsaid escape-gas pressure, and means exerting a constantload on saidlast-named fluid-pressure devices for controlling the esczmc-gasrelease/pressure, substantially as described.

In testimony whereof I afi'ix my signature in presence of two Witnesses.

' JUS'JTUS C, (:iOOSMANN.

iiitnesses;

, RUDOLPH TM. Lo'rz,

F. F. Wilson.

